2(3-phenyl-3-hydroxypropyl 1-2 amino)ethyl-thienyl-(3)-ketone

ABSTRACT

THEIR SALTS AND QUATERNARY AMMONIUM COMPOUNDS, AS WELL AS THEIR OPTICALLY ACTIVE ISOMERS OR DIASTEREOMERS WHEREIN R1 TO R4 REPRESENTS HYDROGEN, HALOGEN, LOWER ALKYL, ARALKYL, PHENYL, HYDROXYL, LOWER ALKOXY, NITRO OR LOWER CARBOALKOXY, R5 AND R6 ARE HYDROGEN OR METHYL, R7 AND R8 ARE HYDROGEN, HALOGEN OR LOWER ALKOXY, X IS A HETEROCYCLIC RING SYSTEM, MOMO- OR CONDENSED BICYCLIC, WITH 1-4 HETERO ATOMS, IN WHICH THE INDIVIDUAL RINGS HAVE 5 TO 6 MEMBERS AND CAN ALSO CONTAIN 1 OR MORE CARBONYL GROUPS, Y IS -CO- OR -CH(OH)-. THESE COMPOUNDS HAVE PHARMACOLOGICAL ACTIVITY IN THAT THEY INCREASE THE CORONARY BLOOD FLOW BY SIMULTANEOUSLY CAUSING DILATION OF THE CORONARIES AND AN INCREASE IN CONTRACTION STRENGTH.   R7,R8-BENZENE (I)   (R2-(R3-)X(-R1)(-R4)-Y-CH(-R5)-CH2-NH-CH(-R6)-CH(-OH)-),   COMPOUNDS OF THE FORMULA

United States Patent US. 01. 260-3323 0 1 Claim ABSTRACT OF THE DISCLOSURE Compounds of the formula R3 4 R5 a Re 1 their salts and quaternary ammonium compounds, as well as their optically active isomers or diastereomers wherein R to R represent hydrogen, halogen, lower alkyl, aralkyl, phenyl, hydroxyl, lower alkoxy, nitro'or lower carboalkoxy, R and R are hydrogen or methyl, R and R are hydrogen, halogen or lower alkoxy, X is a heterocyclic ring system, monoor condensed bicyclic, with 1-4 hetero atoms, in which the individual rings have 5 to 6 members and can also contain 1 or more carbonyl groups, Y is CO or CH(OH). These compounds have pharmacologicalactivity in that they increase the coronary blood fiow by simultaneously causing dilation of the coronaries and an increase in contraction strength.

This application is a continuation-in-part of application Ser. No. 693,138, filed Dec. 26, 1967, now Pat. No. 3,514,465.

Detailed description of the invention including preferred embodiments The following heterocyclic ring systems, for example, come into consideration for the compounds according to the invention: furane, thiophene, pyrrole, pyrazole, thiazole, pyridine, pyrimidine, thiazine, pyrazolone, benzofurane, benzothiophene, indole, quinoline, isoquinoline, benzodioxol, benzodioxane, decahydroisoqninoline, benzothiazole and benzimidazole.

The compounds according to the invention of the above Formula I can be produced in a known manner by (a) Reacting a compound of the formula 1:CC OCH2 R R R (II) with a compound of the formula R7 H2NC|}H(OH) R F. (III) in the presence of formaldehyde or a formaldehyde source and a solvent.

(b) Reacting a compound of the formula 3,715,369 Patented Feb. 6, 1973 with a compound of the formula in which W and V are different and are either halogen or NH;; in the presence of a basic substance and, if desired, in the event Y is CO, reducing such group to a CH(OH) group and, if desired, converting the bases produced into their pharmacologically acceptable acid addition salts or quaternary ammonium salts.

The process according to method (a) is carried out in the usual manner at a temperature between 20 and 150 C. Alcohols, dioxane, glacial acetic acid and the like come into consideration as solvents.

The process according to method (b) in general when using an unsaturated ketone of Formula IV can be carried out at temperatures between 20 and C. in an inert solvent, such as, ether, acetone, dioxane or chloroform, whereas when the corresponding Mannich base is used, which during the reaction is transformed into an intermediate of Formula IV, the reaction temperature used is normally higher, preferably, between 80 and C., and solvent such as Water, alcohol/water, or a two phase system such as benzene/water toluene/water come into consideration.

The process according to method (c) is usually carried out at elevated temperatures in a solvent such as alcohols, ether, dimethyl formamide and the like.

The compounds produced which contain optically active carbon atoms and which as a rule are produced as racemates can be resolved into their optically active isomers in the usual manner, for example, with the aid of an optically active acid. It, however, is also possible to employ optically active compounds or disastereomers as the starting materials whereby the end product in the corresponding pure optically active form or diastereomeric configuration is obtained.

1 The free bases can be converted into their salts with the usual pharmacologically acceptable acids such as .HCl, HBr, H 80 acetic acid, citric acid, succinic acid, maleic acid, fumaric acid, latic acid, p-toluene sulfonic acid and the like. Those compounds containing basic tertiary nitrogen atoms can be converted to their quaternary salts with the usual pharmacologically acceptable quaternizing agents such as the lower alkyl halides. The free bases can be removed from the salts, for example, by treatment with aqueous NaOH and other salts can be prepared from such free bases.

As already indicated, the compounds according to the invention have a pharmacological activity in that they increase the coronary blood flow by causing dilation of the coronaries, as well as an increase in contraction strength of the heart.

When tested on the isolated guinea pig heart according to Langendorff (Pfliigers Arch. 61, 291, 1895) it was found that the compounds according to the invention were active in doses between -500 ,ug./heart (,ug.=' =microgram) in dilating the coronaries while simultaneously increasing the contraction strength.

The indications for the compounds according to the invention are:

Coronary insufliciency Angina pectoris Myocardial infarct Myocardial insufliciency Circulatory disturbances of various geneses 1 Disturbances of the peripheral and cerebral blood flo Migraines Arteriosclerosis The novel compounds can be used, if desired, also in combination with other medicaments in the form of pharmaceutical compositions suited for enteral, parenteral, oral or per lingual application.

The acute toxicity of the compounds according to the invention when tested on mice by the method of Miller and Tainter (Proc. Soc. exper. Biol. a Med. 57, 261, 1944) expressed as the LD is between 100 mg./kg. and 5000 mg./kg. oral.

The individual doses for human beings, depending on form of administration are between 0.5 and 100 mg., once or more times a day.

The following examples will serve to illustrate the compounds according to the invention. For sake of simplicity the symbol Z is used in the structural formulae and nomenclature of a number of the examples to represent respectively and 2- 3-phenyl-3-hydroxy-propyl- (2) amino] -ethyl" EXAMPLE 1 1-{2-[3-phenyl-3 hydroxy-propyl-(2) amino]-ethyl}- thienyl-(2)ketone, that is, 1-{Z}-thienyl-(2)-ketone Method (a): 12.6 (0.1 mol) of Z-acetyl-thiophene, 18.7 g. (0.1 mol) of l-norephedrine-HCI and 4 g. (0.13 mol) of paraformaldehyde were dissolved in 20 ml. of isopropanol and after addition of 0.2 mol of concentrated HCl boiled under reflux for 2 hours. Thereafter 100 ml. of acetone were added to the still warm solution. The hydrochloride which crystallized out upon cooling was purified by recrystallization from ethanol. Its melting point was 191-192" C. and the yield 17 g.

Method (b): 1.5 g. (0.01 mol of l-norephedrine were dissolved in 50 ml. of ether and 2.7 g. (0.02 mol) of thienyl vinyl ketone dissolved in 10 ml. of ether added thereto. After /2 hour 2 g. of the base separated out which after recrystallization from ethanol had a melting point of 118-120 C. The hydrochloride produced therefrom had a melting point of 191-192 C.

Method (c): 5.2 g. (0.03 mol) of 2-[13-chloropropionylJthiophene were dissolved in dimethyl formamide and united with a solution of 4.5 g. (0.03 mol) of 1- norephedrine and 4 g. (0.03 mol) of triethylamine in 25 ml. of dimethyl formamide. After 1 hour the triethylamine HCl which was formed was filtered OE and the filtrate acidified with isopropanolic HCl. Subsequently, the HCl salt was precipitated from the solution by addition of ether and recrystallized from ethanol. Its melting point was 191-192 C. and the yield was 7 g.

4 EXAMPLE 2 1-{Z}-furyl-(2)-ketone 11 g. (0.1 mol) of Z-acetyI-furan, 18.7 g. (0.1 mol) of l-norephedrine-HCI and 4 g. (0.13 mol) of paraformaldehyde were heated for 2 hours under reflux in 20 ml. of isopropanol with the addition of 5 drops of ethanolic HCl. The HCl salt which had precipitated out was stirred up with 50 ml. of acetone and filtered off. It was purified by recrystallization from ethanol. Its melting point was 186-187 C. and the yield was 10.5 g.

EXAMPLE 3 1- {Z}- [4-methyl-thiazolyl- (2) -ke tone OHPL 7 g. (0.05 mol) of 4-methyI-Z-acetyI-thiazole, 9.4 g. (0.05 mol) of l-norephedrine-HCI, 2 g. (0.067 mol) of paraformaldehyde and 5 drops of isopropanolic HCl in 20 ml. of isopropanol were reacted and processed as in Example 2. The HCl salt was recrystallized from methanol. Its melting point was 197-199 C. and the yield 7 g.

EXAMPLE 4 1-{Z}-antipyryl-(4)-ketone CflHIS 11.5 g. of 4-acetyl-antipyrin (0.05 mol), 9.5 g. of 1- norephedrine-H'Cl (0.05 mol) and 2 g. of paraformaldehyde (0.067 mol) were introduced into 20 ml. of isopropanol and 5 drops of isopropanolic HCl added thereto and the mixture boiled for a total of 5 hours during which after 3 hours an additional 1 g. of paraformaldehyde was added. Thereafter the solvent was distilled off and the residue treated with aqueous soda. The oily Mannich base produced was crystallized with the aid of ether. It formed the dihydrochloride with 2 mol of HCl which was recrystallized from ethanol. Its melting point was 206-208 C. and the yield was 9 g.

EXAMPLE 5 1- {Z} -pyridyl- (3 -ketone N l CH 1-{Z}- [2,4-dimethy1-thiazolyl- (5 ]-ketone CBS-13:0 0 Z 25 g. (0.16 mol) of 2,4-dimethyl-5-acetyl-thiazole, 30 g. (0.16 mol) of l-norephedrine-HCI and 5 g. (0.16 mol) of paraformaldehyde were introduced into 50 ml. of isopropanol and 15 drops of isopropanolic HCl added thereto. The mixture was boiled on a water bath for a total of 1 hour. An additional 1.5 g. of paraformaldehyde was added after /2 hour. The reaction solution was diluted with 100 ml. of acetone while still warm. The HCI salt which precipitated out was recrystallized from 80% ethanol. Its melting point was 208-210" C. and the yield 6.6 g.

EXAMPLE 7 1-{Z}- 4-methyl-2-hydroxy-thiazolyl- (5 -ketone 5 g. (0.035 mol) of 4-methyl-2-hydroxy-5-acetylthiazole, 6.6 g. (0.035 mol) of l-norephedrine-HCl and 1.5 g. (0.05 mol) of paraformaldehyde were boiled under reflux for 2 hours in 20 ml. of glacial acetic acid. The H'Cl salt which crystallized out on cooling was recrystallized from methanol/ethanol (1:1). Its melting point was 209-210" C. and the yield 4.5 g.

EXAMPLE 8 1-{Z}-cumaronyl-ketone EXAMPLE 9 1-3-{3- [3-phenyl-3-hydroxy-propyl-(2)-amino] propionyl}-thionaphthene 17.6 g. (0.1 mol) of 3-acetyl-thionaphthene, 18.7 g. (0.1 mol) of l-norephedrine-HCI and 4.5 g. (0.15 mol) of paraformaldehyde were boiled under reflux for 2 hours in 50 ml. of isopropanol. The solution was then diluted with 100 ml. of acetone while still warm. Upon cooling the HCl salt precipitated out. It was recrystallized from methanol. Its melting point was 220-221 C. and the yield 18.5 g.

EXAMPLE 10 1-3-{3-[3-phenyl-3-hydroxy-propyl-(2)-amino]- propionyl}-l-methyl-indole 25 g. (0.13 mol) of 1-methyl-3-acetyl-indole, 24.3 g. (0.13 mol) of l-norephedrine-HCI and 5 g. (0.17 mol) of paraformaldehyde were dissolved in 100 ml. of isopropanol and boiled under reflux for a total of 6 hours. After the second and fourth hours an additional 2.5 g. of paraformaldehyde were added. Thereafter the solvent was distilled off and the residue dissolved in warm acetone. The HCI salt which crystallized out on cooling was recrystallized from ethanol. Its melting point was 194 195 C. and the yield 22 g.

EXAMPLE ll 1-5-{3- 3-phenyl-3-hydroxypropyl- (2 -amino] propionyl}-benzodioxol-( 1,3)

8 g. (0.048 mol) of S-acetyl-benzodioxol-(1,3), 9.1 g. (0.048 mol) of l-norephedrine-HCl and 2.9 g. (0.097 mol) of paraformaldehyde were boiled on a water bath for 2 hours in 30 ml. of isopropanol after addition of 5 drops of isopropanolic HCl. After addition of 100 ml. of acetone to the warm reaction solution, the HCl salt precipitated out. It was recrystallized from ethanol. Its melting point was 195-197 C. and the yield 9 g.

EXAMPLE l2 1-4-{3-[3-phenyl 3 hydroxy-propyl-(2)-amino] propionyl}-l,3-dimethyl and -1,5-dirnethyl pyrazole (mixture) 26 g. (0.19 mol) of the isomeric mixture of 1,3- and 1,5-dimethyl-4-acetyl-pyrazole formed during the synthesis, 37.4 g. (0.2 mol) of l-norephedrine'Hcl and 9 g. (0.3 mol) of paraforrnaldehyde were boiled under reflux under an atmosphere of nitrogen in 150 ml. of isopropanol for 3 hours. Upon cooling the HCl salt crystallized. It was recrystallized from isopropanol and then twice from ethanol. Its melting point was 196 C. and the yield 11 g.

EXAMPLE l3 1-{Z}-quinolyl-(3 )-ketone 10 g. (0.058 mol) of 3-acetyl quinoline, 11.2 g. (0.058 mol) of 1-norephedrine-HCl and 1.6 g. (0.058 mol) of paraformaldehyde were boiled under reflux on a water bath in ml. of isopropanol for 2.5 hours. An additional 0.8 g. (0.026 mol) of paraformaldehyde was added after 1 hours boiling. Upon addition of 150 ml. of acetone the HCl salt precipitated out. It was recrystallized from methanol. Its melting point was 205-206 C. and the yield 5 g.

EXAMPLE 14 1-{Z}-isoquinolyl- (4) -ketone 5 g. (0.024 mol) of 4-acetyl isoquinoline-HCI, 4.6 g. (0.024 mol) of l-norephedrine-HCl and 0.7 g. (0.024 mol) of paraformaldehyde were boiled on a water bath for 2.5 hours in 50 ml. of a 1:1 mixture of ethanol-isopropanol and an additional 0.4 g. (0.012 mol) of paraformaldehyde was added after 1 hours boiling. Upon cooling, the dihydrochloride salt precipitated out. It was recrystallized from ethanol. Its melting point was 208 C. and the yield 7 EXAMPLE 1s 1- {Z}- 1,2,4-trimethyl-S-carbethoxypyrrolyl- (3 ]-ketone CH3 U CO-Z OzHsOOCl ICE:

18 g. (0.081 mol) of 1,2,4-trimethyl-3-acetyl-S-carbethoxypyrrole, 15.2 g. (0.081 mol) of l-norephedrine-HCI and 2.4 g. (0.081 mol) of paraformaldehyde were boiled on a water bath for 1.5 hours in 50 ml. of isopropanol. An additional 1.2 g. of paraformaldehyde were added after /2 hours boiling. Upon addition of 100 ml. of acetone the HCl salt precipitated out. It was recrystallized from ethanol. Its melting point was 178180 C. and the yield 10 g.

EXAMPLE 16 1-6{3-[3-phenyl-3-hydroxy-propyl-(2)-amino]- propionyl}-benzodioxane- 1,4)

11.7 g. (0.066 mol) of 6-acetyl-1,4-benzodioxane, 12.5 g. (0.066 mol) of l-norephedrine-HCI and 2 g. (0.067 mol) of paraformaldehyde were boiled on a water bath in 33 ml. of isopropanol for 2 hours. An additional 2 g. (0.067 mol) of paraformaldehyde were added after 1 hours boiling. The solvent was distilled off and the residue treated with acetone. The I-ICl salt which precipitated out was recrystallized from ethanol. Its melting point was 201 C. and the yield 7.5 g.

EXAMPLE 17 1-2-{3-[3-phenyl-3-hydroxy-propyl-(2)-amino]- propionyl}-benzodioxane-( 1,4)

11 g. (0.061 mol) of 2-acetyl-1,4-benzodioxane, 11.6 g. (0.062 mol) of l-norephedrine'Hcl and 1.85 g. (0.062 mol) of paraformaldehyde were reacted in 30 ml. of isopropanol and processed as in Example 16. The melting point of the HCl salt was 178 C. and the yield 8 g.

EXAMPLE 18 1-{Z}-[Z-benzyl-10-hydroxy-decahydroisoquinolyl- (4) -ket0ne 8 EXAMPLE l9 1-{Z}-[5-nitro-furyl-(2) ]-ketone 11.6 g. (0.075 mol) of 2-acetyl-5-nitro-furane, 14 g. (0.075 mol) of l-norephedrine'HCl and 3 g. (0.1 mol) of paraformaldehyde in 50 ml. of isopropanol were heated on a water bath for 3 hours. The HCl salt which precipitated out upon cooling was recrystallized from ethanol. Its melting point was 210 C. and the yield 3 g.

EXAMPLE 20 1-4-{3-[3-phenyl-3-hydroxy-propyl-(2)-amino]- propionyl}-1,3,5-trimethyl pyrazole l CO-Z N/-CHa 27 g. (0.178 mol) of 1,3,5-trimethyl-4-acetylpyrazole, 33 g. (0.177 mol) of l-norephedrine-HCl and 10.8 g. (0.36 mol) of paraformaldehyde in 150 ml. of isopropanol were heated for 2 hours on a water bath. Thereafter the solvent was distilled off and ml. acetone were added to the residue. The HCl salt which precipitated was recrystallized from isopropanol. Its melting point was 191 C. and the yield was 14.5 g.

EXAMPLE 21 1-4-{3- 3-phenyl-3-hydroXy-propyl-(2)amino] -propionyl}-1-benzyl-3,5-dimethyl-pyrazole 13.5 g. (0.0624 mol) of 3,5-dimethyl-1-benzyl-4-acetylpyrazole, 11.1 g. (0.0593 mol) of l-norephedrine-HCI and 3.6 g. (0.12 mol) of paraformaldehyde were heated on a water bath in 200 ml. of isopropanol for 2 hours. The HCl salt precipitated out from the reaction solution after addition of 100 ml. of acetone and it was recrystallized from ethanol. Its melting point was 200 C. and the yield 11 g.

EXAMPLE 22 d,l-{2-[3-(3-fluoro-4-methoxy-phenyl)-3-hydroxypropyl-(2)-amino] -ethyl}-thienyl- (2) -ketone 28 g. (0.119 mol) of d,l-3-(3-fluoro-4-methoxyphenyl) -3-hydroxy-propyl-(2)-amine-HC1, 15 g. (0.119 mol) of 2-acetyl-thiophene and 7.2 g. (0.24 mol) of paraformaldehyde were reacted in 200 ml. of isopropanol and processed as in Example 21. The HCl salt was recrystallized from ethanol. Its melting point was 208 C. and the yield was 10 g.

EXAMPLE 23 1-{ 1- 3-phenyl-3-hydroXy-propyl- 2 -arnino] -propyl- (2) }-thienyl-(2)-ketone CH CH i L0o-orr-onrNnJln-mnom- 43 g. (0.307 mol) of 2-propionyl-thiophene, 57.7 g. (0.308 mol) of l-norephedrine-HCl and 18.4 g. (0.614 mol) of paraformaldehyde were heated on a water bath in 50 ml. of isopropanol for 1 hour. 100 ml. of acetone were added to the reaction solution and the HCl salt which precipitated out recrystallized from ethanol. Its melting point was 208 C. and the yield was 16.5 g.

EXAMPLE 24 l-{Z}--chloro-thienyl-(2)-ketone CIUC O-Z g. (0.187 mol) of 2-acetyl-5-chloro-thiophene, g. (0.187 mol) of l-norephedrine-HCI and 5.6 g. (0.187 mol) of paraformaldehyde were heated in 50 ml. of isopropanol and processed as in Example 21. The HCl salt was recrystallized from ethanol. Its melting point was 198 C. and the yield was 16 g.

EXAMPLE 25 d,l-{2- [2-(2-chloro-phenyl) -2-hydroxy-ethylamino]- ethyl}-thienyl-(2)-ketone 12.6 g. (0.1 mol) of 2-acetyl-thiophene, 20.8 g, (0.1 mol) of d,1-2-(2-chloro-phenyl)-2-hydroxy-ethylamine. HCl and 4.5 g. (0.15 mol) of paraformaldehyde were heated on a water bath for 2 hours in 100 ml. of isopropanol. Thereafter the solvent was distilled off and the residue caused to crystallized by addition of ethyl acetate. The HCl salt produced was recrystallized from ethanol. Its melting point was 158160 C. and the yield was 4 g.

EXAMPLE 26 [3-phenyl-3-hydroxy-propyl- (2) ]-{3- [4-phenylthiazolyl- (2) ]-3-hydroXy-propyl-( 1 }-amine -6 g. (0.015 mol) of 1-{Z}-[ Lphenyl-thiazolyl-(2)]-ke tone-HCl were suspended in 60 ml. of methanol and reduced by the addition of 0.6 g. (0.016 mol) of sodium borohydride. After 1 hour the solvent was distilled 01f and the residue dissolved in acetone. Fumaric acid was added to such solution to precipitate out the fumarate salt. The base was again set free from the fumarate with aqueous NaOI-I. The resulting oily base was taken up in ether and converted to the HCl salt with isopropanolic HCl and such salt recrystallized from ethanol. [ts melting point was l78181 C. and the yield was 2.5 g.

EXAMPLE 27 [3-pheny1-3-hydroxy-propy1-(2) ]-{3- [thienyl- (2) S-hydroxy-propyl- 1 }-amine 63 g. (0.2 mol) of 1-{Z}-thienyl-(2)-ketone-HC1 and 300 g. of aluminum isopropylate were heated to 130 C. for 2 hours in 2 liters of isopropanol and the acetone produced during the reduction distilled off over a column. After 7 hours the cooled solution was decomposed by addition of 100 g. of citric acid in 200 ml. of water and then rendered strongly alkaline with aqueous NaOH. The organic phase was dried over calcium oxide and the solvent distilled oif under vacuum. The amino alcohol product melted at 123-125 C. after it was recrystallized from 50% ethanol. Upon addition of an equimolar quantity 10 of HCl a HCl salt was obtained which had a melting point of 152155 C. The yield was 13 g.

EXAMPLE 28 [3-phenyl-3-hydroxy-propyl- 2) -{3-[cun1aronyl(2) 3-hydroxy-propyl- 1 }-amine 18 g. (0.05 mol) of 1 {Z} cumaronyl-ketone-HCI were suspended in ml. of ethanol and reduced at room temperature with 2 g. of sodium borohydride dissolved in 50 ml. of ethanol. After 1 hour, 50 ml. of concentrated HCl were added and the NaCl produced filtered 01f. The solvent was then distilled oil under vacuum and the residue recrystallized from isopropanol/ethyl acetate (1:1). The HCl salt produced melted at 2l0215 C. with decomposition. The yield was 11 g.

EXAMPLE 29 [-phenyl-3-hydroXy-propyl- (2) [3-thionaphthenyl- 3 3-hydroxy-propyl-( 1 }-amine 19 g. (0.05 mol) l 3-[phenyl-3-hydroxy-propyl-(2)- amino]-propionyl}-thionaphthene-HCl were suspended in 100 ml. of ethanol and reduced with 2 g. of sodium borohydride in 50 ml. of ethanol at room temperature. After 1 hour the reaction mixture was filtered and the solvent distilled off and the residue dissolved in ether. The H'Cl salt was precipitated from the ether solution by addition of ethanolic HCl and recrystallized from isopropanol. Its melting point was 167-170 C. and the yield was 12 g.

EXAMPLE 30 l- [2- [3-phenyl-3 -hydroxypropy1- (2) -amino] -ethyl] thienyl-(3)-ketone 31.5 g. (0.25 mole) of 3-acetyl thiophene, 7.5 g. of paraformaldehyde and 47 g. (0.25 mole) of l-norephedrin- HCl were heated at reflux for 3 hours in 100 ml. of isopropanol. After the first hour a further 3.8 g. of paraformaldehyde were added. The HCl salt which precipitated upon cooling was washed with acetone and recrystallized from ethanol, M.P. -196 C., yield 53 g.

EXAMPLE 31 l- [2-[3-phenyl-3 -hydroxypropyl-(2)amino] -ethyl] [2,5-dimethylthienyl-.( 3 -ketone tated upon cooling and was recrystallized from ethanol, M.P. 207-208", C. Yield 161 g.

1 1 EXAMPLE 32 1-{2-[3-phenyl-3-hydroxypropyl-(2)-amino]-ethyl}- [2,5-dichlorothienyl-(3 -ketone C O CElCHlNHiH 01- 01 S EXAMPLE 33 1-thienyl- 3 l-hydroxypropyl- 3) l-phenyl- 1- hydroxypropyl- (2 -amine 32.6 g. of l-[2-[S-phenyl-3-hydroxypropyl-(2)-amino]- ethylJ-thienyl-(3)-ketone-HC1 and 150 g. of aluminum isopropylate were heated at 130 C. in 1 liter of isopropanol and the acetone arising from the reaction distilled off over a column. After the reaction ended the solvent was partially distilled off and the residue decomposed with a solution of citric acid in 100 ml. of water and subsequently made strongly alkaline with 30% soda lye. The organic phase was dried over calicum oxide, the solvent distilled olf and the residue brought to crystallization with ether. The aminoalcohol in acetone was transformed into the HCl salt with isopropanolic HCl, precipitated with ether and subsequently recrystallized from ethanol. Yield 6 g., M.P. 160-162 C.

EXAMPLE 34 [1- 2,5-dichlorothienyl- 3 H 1-hydroxypropyl-( 3 [l-phenyll-hydroxypropyl- (2) -amine CH(OH)CH2CH2NHCH Cl Cl S 9.8 g. (0.025 mole) of l-[2- [-3-phenyl-3-hydroxypropyl- 2) -amino]-ethyl]- [2,5-dichlorothienyl-(3 ketoue-HCl were suspended in 50 ml. of methanol and 1 g. of sodium boranate added portionwise. After standing overnight it was filtered, the solvent distilled otf, the residue treated with water and the base taken up in ether. The HCl salt 'was precipitated with isopropanolic l-ICl and recrystallized from methyl ethyl ketone, M.P. ISO-181 C. Yield g.

In addition to the action on the coronary circulation the furane, thiophene and pyrrole compounds of the invention have a particularly positive inotropic efiect and primarily increase the peripheral circulation.

The compounds of the invention with the use of customary aids and using known methods can be processed to the desired forms of administration such as tablets, dragees, gelatin capsules, oral solutions, parenteral solutions, suspensions, suppositories and the like.

In the production of solutions it may be necessary in order to obtain the desired concentration of active material to use organic solvents alone or admixed with water. As physiologically compatible organic solvents there can be used for example mono or polyhydric alcohols, e.g. ethyl alcohol, ethylene glycol, propylene glycol, polyglycols, e.g. diethylene glycol, tetraethylene glycol, esters, e.g. amyl acetate, etc.

In order to stabilize the molecule of the active material there are employed aqueous or water containing solutions of physiologically compatible acids, e.g. hydrochloric acid, to an acid pH of about 1-4.

Other forms of preparation can also be suitably stabilized with acids.

In case it is desired medicinal preservatives such as sorbic acid, p-hydroxybenzoic acid esters, e.g. the ethyl ester, and the like can be added.

When no chemical incompatibility exists there can be added to the medicinal preparations other medicinal materials, such as for example spasm dissolving, pain relieving, inflammation stopping agents, etc.

EXAMPLE 35 An injectable solution was prepared by heating 10 g. of the hydrochloride product of Example 1 at about 5060 C. in a mixture of g. of ethyl alcohol, 320 g. of 1,2-propylene glycol and 1300 ml. of water. After cooling to about 20 C. the solution was acidified to a pH of 2.0102 with 25% hydrochloric acid and then made up to 2 liters with water for injection.

The solution was passed through a sterilizing filter and then in the customary Way emptied into 2 ml. glass ampules. The filled ampules were sterilized for 30 minutes by heating at 100 C.

EXAMPLE 36 Tablets were produced as followed: 200 g. of the hydrochloride product of Example 1, 50 g. of tartaric acid, 50 g. of microcrystalline cellulose, 400 g. of lactose, 470 g. of cornstarch and 60 g. of highly dispersed silica were mixed and worked in known manner into a granulated material with about 450 g. of starch glue (10%). The dry granules were passed through a sieve having a mesh diameter of 1.2 mm., then mixed with g. of microcrystalline cellulose, 40 g. of highly dispersed silica, 50 g. of polyvinyl pyrrolidone, 440 g. of corn starch, 220 g. of talc and 5 g. of magnesium stearate and in the usual way compressed into tablets of 9 mm. diameter and a weight of 220 mg. 1 tablet equalled 20.0 mg. of the HCl product of Example 1.

The compounds of the invention were tested on narcotized animals (dogs). For this purpose the thoracic cavity was opened under artificial respiration and the blood fiow in the aorta, a main coronary branch and the femoralis artery measured with an electromagnetic fiowmeter. The pressure distribution in the left chamber of the heart was recorded with a rigid catheter and for the determination of the speed of increase in pressure (J .H. Siegel and E. H. Sonnerblick; Circulation Res. 12 597 (1963). This size is valid as a very good measure of the strength of the heat contraction.

With the compounds of the invention there were obtained for example the values (dosage l mg./kg. of body weight) set forth in Table 1.

TABLE 1 Percent maximum Femoralis A Cardiac Conorary Compound dp./dt output flow flow Example 1 +84 +50 +48 +24 Example 2 +44 +29 +35 +35 Example 27-- +85 +133 +78 +37 Example 15 +50 +19 +7 +24 TABLE 2 Dosage, Percent maximum -l of body Blood Femoralis Vertebralls Compound weight pressure flow flow Example 33 1 +13 +110 +25 Example 34 3 22 +54 +145 The results show that the compounds of the invention provide a considerable increase in the heart strength, cardiac output, and cerebral and peripheral blood flow.

The determination of acute toxicity followed the procedure of Miller and Tainter (Proc. Soc. Exper. Biol. Med. 57 261 (1944) on mice.

The compounds are indicated as medicines in improving or curing the following illnesses: disturbances of the central and peripheral blood flow as Raynauds disease, cerebral sclerosis, cerebral hardening, apoplexy prophylaxis and therapy, migrain, intermittent lameness, diabetic angiopathy, acrocyanosis.

The medicaments containing one or more of the compounds of the invention alone or in combination with other active materials can be dispersed orally or parenterally. They can be applied in the form of tablets, capsules, pills, drages or small plugs. They can be taken as liquids, e.g. in oily or aqueous solutions or suspensions or by injection or infusion. Activity is noted from 0.1 mg./ kg. body weight when taken intravenously or from 0.5 mg./kg. when taken perorally. Dosages up to 1 mg./kg. intravenously or up to 10 mg./kg. orally are tolerated without substantial side eifects. Optimum dosage of 4-5 mg. intravenously or 10-15 mg. perorally. These dosages can be delivered once or several times a day.

The acute toxicity of the compounds of the invention (expressed by the LD in mg./ kg.) according to intraperitoneal application in mice is between and mg./ kg.

What is claimed is:

-1. A compound which is 1-[2-[3-phenyl-3-hydroxypropyl- (2 -amino] ethy1] -thienyl- 3 -ketone.

No references cited ALEX MAZEL, Primary Examiner J. TOVAR, Assistant Examiner US. Cl. X.R. 

